Home / 21,180.82-31,721.13-18,392.34

Finding the Fourth Proportional to 21,180.82, 31,721.13 and 18,392.34

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Solution

The fourth proportional to 21,180.82, 31,721.13 and 18,392.34 is: 27,545.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.82 : 31,721.13 = 18,392.34 : x
  2. Step 2: Convert to fraction form
    21,180.82/31,721.13 = 18,392.34/x
  3. Step 3: Cross multiply
    21,180.82x = 31,721.13 × 18,392.34
  4. Step 4: Simplify right side
    21,180.82x = 583,425,774.82
  5. Step 5: Solve for x
    x = 583,425,774.82/21,180.82
  6. Step 6: Final answer
    x = 27,545.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.